- Companies
- Electricians
- Southampton
- Smoke Vent Systems Ltd
Smoke Vent Systems Ltd
- Company number
- 07502781
- Incorporated
- 24 Jan 201115 years trading
- Registered office
- Partnership House, 84 Lodge Road, Southampton, SO14 6RG
- Nature of business
- Electrical installation; Architectural activities
Smoke Vent Systems Ltd is a 15-year-old private limited company registered in Southampton, company number 07502781, one of 342 electrical contractors in Southampton. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £18K (-11.8%) on the year before, to £131K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £186K against £57K owed within a year: 3.3 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £131K | £186K | £57K | 3 | |
| 31 Mar 2025 | £149K | £203K | £57K | 3 | |
| 31 Mar 2024 | £122K | £138K | £166K | £46K | 3 |
| 31 Mar 2023 | £129K | £203K | £80K | 3 | |
| 31 Mar 2022 | £94K | £76K | 4 | ||
| 31 Mar 2021 | £80K | £66K | 4 | ||
| 31 Mar 2020 | £83K | £51K | 3 | ||
| 31 Mar 2019 | £82K | £92K | |||
| 31 Mar 2018 | £68K | £48K | |||
| 31 Mar 2017 | £77K | £73K |
Who runs and owns Smoke Vent Systems Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| K*** L*** | Director | Apr 2012 |
| R*** L*** | Director | Mar 2016 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| G*** M*** | Director | Jan 2011 | Mar 2012 |
People with significant control (2)
Where Smoke Vent Systems Ltd is registered
The registered office is in Southampton (SO14), in the Southampton local authority area, South East. Show SO14 6RG on a map.
Other trade companies in SO14
- Cat Garage LtdMechanics and garages
- Sonix LtdBuilders
- Vanie & Dick LtdBuilders
- 33 Motors LtdMotor traders
- Pure Light Cleaning LtdCleaning companies
- Cccjr Trading LimitedMotor traders
- Otess LtdFloor and wall tilers
- Bevertex LimitedElectricians
Shared registered office
29 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Smoke Vent Systems Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 07502781
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 January 2011 (15 years ago)
- Registered office
- Partnership House, 84 Lodge Road, Southampton, SO14 6RG
- Nature of business
- Electrical installation (SIC 43210)
Architectural activities (SIC 71111) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 3 November 2025
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Southampton
Other active electrical contractors registered in Southampton.
- Solent Electrical Consultancy-Marine Limited2012
- Solent Renewables Ltd2022
- Solid Electrics Limited2019
- Solo Electrical UK Limited2008
- Solo Group (South) Limited2023
- South City Electrical Limited2005
- South West Electrical and Maintenance Ltd2026
- Southern Multi Trade Ltd2026
All electrical contractors in Southampton · All trades in Southampton · Electricians across the UK
Frequently asked questions
When are Smoke Vent Systems Ltd's accounts due?
Smoke Vent Systems Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Smoke Vent Systems Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Smoke Vent Systems Ltd still trading?
Smoke Vent Systems Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Smoke Vent Systems Ltd do?
Smoke Vent Systems Ltd is registered under Electrical installation (SIC 43210); Architectural activities (SIC 71111).
How old is Smoke Vent Systems Ltd?
Smoke Vent Systems Ltd was incorporated on 24 January 2011, 15 years ago.
Who runs Smoke Vent Systems Ltd?
Smoke Vent Systems Ltd has 2 active directors, the longest-serving appointed in Apr 2012. Their names and service addresses are on the Companies House register.
Who owns Smoke Vent Systems Ltd?
2 people or companies have significant control of Smoke Vent Systems Ltd: an individual (owns 50% to 75% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Smoke Vent Systems Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Smoke Vent Systems Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.